1.	Simplify 1 Simplify the following expression: $$ {\left(-6 - -4\right)}^{2} + \left(2 + -2\right)\left(-6 - 1\right) $$ Correct Answer $$ 4$$ or 4.00000

2.	Simplify 2 Simplify the following expression: $$ \frac{2\times2\times1}{-4\times4 + -3 - 2} $$ Correct Answer $$ \frac{-4}{21}$$ or -0.190476

3.	Fractions 1 Simplify the following expression: $$ \frac{1}{6} + \frac{-4}{5} $$ Correct Answer $$ \frac{-19}{30}$$ or -0.6333333333333334

4.	Fractions 2 Simplify the following expression: $$ \frac{2}{3}\frac{-1}{6} $$ Correct Answer $$ \frac{-1}{9}$$ or -0.1111111111111111

5.	Significant figures 1. Write the following to 4 significant figures: 0.079359706 Correct Answer 0.07936 or $$7.936\times10^{-2}$$ 2. Write the following to 4 significant figures: 0.010716922 Correct Answer 0.01072 or $$1.072\times10^{-2}$$

6.	Standard Form 1. Write the following in standard form to 5 significant digits: 0.000000875959 Correct Answer $$8.7596\times10^{-7}$$ 2. Write the following in standard form to 4 significant digits: 0.00111487 Correct Answer $$1.115\times10^{-3}$$

7.	Significant figures 1. Write the following in preferred standard form to 2 significant digits: 11.3 Correct Answer $$11\times10^{0}$$ 2. Write the following in preferred standard form to 2 significant digits: 0.4923 Correct Answer $$490\times10^{-3}$$

8.	Simplify 2 Simplify the following expression: $$ {\left(-1 - -5\right)}^{2} - \left(-6 - -5\right)\left(2 + 6\right) $$ Correct Answer $$ 24$$ or 24.0000

9.	Simplify 1 Simplify the following expression: $$ \left(-4 - 2 + 4\times5\right)2\left(5 - -3\right) $$ Correct Answer $$ 224$$ or 224.000

10.	Simplify 2 Simplify the following expression: $$ {\left(2 - -3\right)}^{2} - {\left(\frac{-4}{-2}\right)}^{\frac{-3}{1}} $$ Correct Answer $$ \frac{199}{8}$$ or 24.8750